Interchangeable compass watch-crown.



E. E. STOCKTON. INTBRGHANGEABLE COMPASS WATCH GROWN.

APPLICATION FILED MAR. 11, 1914.

Patented June-2, 1914.

ELMER E. STOCKTON,

0F BRISTOL, CONNECTICUT.

INTERCI-IANGEABLE COMPASS WATCH-CROWN.

Application filed March 11, 1914.

T 0 all who 17bit may concern Be it known that I, ELMER E. STOCKTON, citizen of the United States, residing at Bristol, in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Interchangeable Compass \Vatch-Crowns; and I do hereby declare the following, when taken in con nection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in

Figure 1 a plan view of a compass watchcrown constructed in accordance with my invention. Fig. 2 a view thereof in vertical section.

My invention relates to an in'iprovement in compass watch-crowns, the object being to provide, as a new article of manufacture, a compass watch-crown adapted not only for application to the ordinary standard watch at the time of its manufacture, but also for substitution for the ordinary crowns with which standard watches are initially provided.

With these ends in view, my invention consists in a compass watch-crown having certain details of construction as will be hereinafter described and pointed out in the claim.

In carrying out my invention as herein shown, I employ a solid crown 2 having a large concentric co1npasscha1nber 3 formed in its outer end for the reception of a compass-needle L protected by acrystal 5 set into an undercut groove 6 in the extreme outer end of the crown and closing in the chamber 3. The lower end of the said compass-chamber 3 is undercut as at 7 for the reception and retention of the edge 8 of the dial or card 7 over which the needle t turns. The inner end of the crown is formed with a deep, concentric annular pendant-receiving groove 9 which receives the sleeve-like outer end of the pendant of a standard watch. The majority of modern stemwinding and stem-setting watches, particularly of the cheaper grade, are standardized so far as the form and construction of the outer ends of their pendants is concerned. The inner end of the crown i also formed with a concentric bore 10 located within the groove 9 and provided for the reception of Specification of Letters Patent.

Patented J one 2, 1914.

Serial No. 823,921.

the outer end 11 of the winding-and-settingstem 12 which is furnished with a wide shoulder 13 upon which the central portion of the inner end of the crown rests, as shown in Fig. 2. The delicate part of a compass is its pivot 14. To provide for positioning and securing this pivot in place without bending it or mar-ring its delicate point upon which the needle 4 turns, I connect the compassrhamber 3 and the bore 10 by means of a pivot-hole 15 leading from the said bore into the said chamber and constructed to form a tight fit for the pivot which is dropped into the bore and driven therefrom into place, the pivot being directed into the pivot hole 15 after it has been dropped into the bore 10- by the beveled inner end 16 thereof. I thus secure the pivot in place from the inner end of the crown rather than from its outer end, whereby I avoid danger of bending the pivot 01' marring its delicate point as was liable to occur by the insertion of the ivot from the outer end of the crown into a pivot hole formed in the bottom of the compasschamber 3 but not intersecting the bore 10.

My improved compass watch-crown being of standard construction, may not only be applied to watches at the time of their manufacture, but being interchangeable with standard watch-crowns, may be sold as an article of manufacture by itself and supplied to the trade so that any person may buy a compass watch-crown at a trifling cost and have it applied to his own watch in place of its initial watch-crown.

I claim As a new article of manufacture, a compass-bearing watch-crown having its outer end formed with a compass-chamber and its inner end formed with a concentric bore for the reception of the outer end of a watch stem, and the crown being also formed with a concentric pivot-hole connecting the said compass-chamber and bore for the reception of a pivot projecting into the center of the said compass-chamber.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

'ELMER E. STOCKTON.

Witnesses P. M. WILoox, Enw. INGRAHAM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

